LITHOGRAPHIC FORM PLATE - TORAY INDUSTRIES

Title:

LITHOGRAPHIC FORM PLATE

Document Type and Number:

WIPO Patent Application WO/1996/025295

Kind Code:

A1

Abstract:

An original form plate for a novel photosensitive lithographic form plate, in which development processing is simple, and which possesses a high ink repellent property without undergoing a desensitization and can use pure water as a dampening water, can be produced by using a lithographic form plate, in which (1) a non-printing area portion made of a hydrophilic swelling layer has an amount of water absorption of 1 to 50 g/m2 and a printing area portion has a less amount of water absorption than that of the non-printing area portion; (2) the non-printing area portion made of a hydrophilic swelling layer has an initial elastic modulus of 0.01 to 10 kg/mm2 and the printing area portion has a larger initial elastic modulus than that of the non-printing area portion; (3) the non-printing area portion made of a hydrophilic swelling layer has a water swelling rate of 10 to 2000 % and the printing area portion has a less water swelling rate than that of the non-printing area portion; or (4) the non-printing area portion made of a hydrophilic swelling layer has a phase separation structure composed of at least two phases, that is, a phase, of which a main component comprises at least a hydrophilic polymer, and a phase, of which a main component comprises a hydrophobic polymer.

Inventors:

ISONO MASANAO (JP)
BABA YUZURU (JP)
TABATA NORIKAZU (JP)
IKEDA NORIMASA (JP)

Application Number:

PCT/JP1996/000324

Publication Date:

August 22, 1996

Filing Date:

February 14, 1996

Export Citation:

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Assignee:

TORAY INDUSTRIES (JP)
ISONO MASANAO (JP)
BABA YUZURU (JP)
TABATA NORIKAZU (JP)
IKEDA NORIMASA (JP)

International Classes:

B41N1/14; (IPC1-7): B41N1/00

Foreign References:

JPS52130702A	1977-11-02
JPH04221699A	1992-08-12
JPS63309970A	1988-12-19

Other References: